Lemon drop:

"Would you like a lemon drop, Minerva?"

"Really Albus, what is it with you and lemon drops?"

"I don't know, I just like lemon"

"But why don't you just buy some real lemon?"

"Minerva, you can't buy real lemon!"

"Of course you can!"

"No you can't, you can't own it. Haven't you seen the disclaimers?"

"What disclaimer?"

"Never mind, Minerva..."